两段适合初学者的php+mysql分页代码

<?php
      $DBSERVER   = "localhost";
   $DBUSER     = "root";
   $DBPASSWORD = "root";
   $DBNAME     = "test";
   $pagesize = 10;
   $server = mysql_connect($DBSERVER, $DBUSER, $DBPASSWORD);
    $db = mysql_select_db($DBNAME);
    mysql_query("set names sjis");
    $sql = " select count(*) as total from test1 where a='11' and b='22' ";
    $rst = mysql_query($sql);
$row = mysql_fetch_array($rst);
    $rowcount = $row["total"];
mysql_free_result($rst);

    $pagecount = bcdiv($rowcount+$pagesize-1,$pagesize,0);

    if(!isset($pageno)) $pageno = 1;
    if($pageno<1) $pageno = 1;
    if($pageno>$pagecount)
      $pageno = $pagecount;
if($pageno>0){
$href = eregi_replace("%2f","/",urlencode($PHP_SELF));
      echo "データ検索結果は：<br />";

   if($pageno>1){
          echo '<a href="' . $href . '?pageno=' . ($pageno-1) . '">前ページ</a> ';
       }
       else{
          echo '前ページ';
       }
       for($i=1;$i<$pageno;$i++){
          echo '<a href="' . $href . '?pageno=' . $i . '">' . $i . '</a> ';
       }
       echo $pageno . ' ';
      for($i++;$i<=$pagecount;$i++){
          echo '<a href="' . $href . '?pageno=' . $i . '">' . $i . '</a> ';
       }
       if($pageno<$pagecount){
          echo '<a href="' . $href . '?pageno=' . ($pageno+1) . '">次ページ</a> ';
       }
       else{
          echo '次ページ ';
       }

       $offset = ($pageno-1) * $pagesize;
       $sql = "select * from entry where a='$_POST[a]' and b='$_POST[b]' LIMIT $offset,$pagesize";
       $rst = mysql_query($sql);
       $num_fields = mysql_num_fields($rst);
       $i = 0;
       while($i<$num_fields){
          $fields[$i] = mysql_field_name($rst,$i);
          $i++;
       }
       echo '<table border="1" cellspacing="0" cellpadding="0">';

       echo '<tr>';
       reset($fields);
       while(list(,$field_name)=each($fields)){
          echo "<th>$field_name</th>";
       }
       echo '</tr>';
       while($row=mysql_fetch_array($rst)){
          echo '<tr>';
          reset($fields);
          while(list(,$field_name)=each($fields)){
             $field_value = $row[$field_name];
             if($field_value==""){
                echo '<td> </td>';
             }
             else{
                echo "<td>$field_value</td>";
             }
          }
          echo '</tr>';
       }
       echo '</table>';
       mysql_free_result($rst);
}
else{
   echo "データない" ;
   }
    mysql_close($server);
?>

=======================================================================

<?php
//连接数据库
$db=mysql_connect("localhost","root","");
mysql_select_db("hy",$db);
//设定每一页显示的记录数
$pagesize=25;
//取得记录总数，计算总页数用
$res=mysql_query("select   count(*)   from   main   "   ,$db);
$myrow   =   mysql_fetch_array($res);
$numrows=$myrow[0];
//计算总页数
$pages=intval($numrows/$pagesize);
if   ($numrows%$pagesize)
$pages++;
//判断页数设置与否，如无则定义为首页
if   (!isset($page))
$page=1;
//判断转到页数
if   (isset($ys))
if   ($ys>$pages)
$page=$pages;
else
$page=$ys;
//计算记录偏移量
$offset=$pagesize*($page-1);
//取记录
$res=mysql_query("select   id,title   from   main   order   by   id   desc   limit   $offset,$pagesize"   ,$db);
//循环显示记录
if   ($myrow   =   mysql_fetch_array($res))
{
$i=0;
?>
<table   width="101%"   border="0"   cellspacing="0"   cellpadding="0">
<tr>
<td   width="5%"   bgcolor="#E1E9FB"></td>
<td   width="95%"   bgcolor="#E1E9FB"><font   color="#FF6666"   size="2">内容</font></td>
</tr>
<?php
do   {
$i++;
?>
<tr>
<td   width="5%"   bgcolor="#E6F2FF"><?php   echo   $i;?></td>
<td   width="95%"   bgcolor="#E6F2FF"><font   size="2">
<a   href="javascript:popwin('view.php?id=<?php   echo   $myrow[0];?>')"   ><?php   echo   $myrow[1];?></a></font></td>
</tr>
<?php
}
while   ($myrow   =   mysql_fetch_array($res));
echo   "</table>"   ;
}
//显示总页数
echo   "<div   align='center'>共有".$pages."页(".$page."/".$pages.")<br>";
//显示分页数
for   ($i=1;$i<$page;$i++)
echo   "<a   href='fenye.php?page=".$i."'>第".$i   ."页</a>     ";
echo   "第".$page."页     ";
for   ($i=$page+1;$i<=$pages;$i++)
echo   "<a   href='fenye.php?page=".$i."'>第".$i   ."页</a>     ";

echo   "<br>";
//显示转到页数
echo   "<form   action='fenye.php'   method='post'>   ";
//计算首页、上一页、下一页、尾页的页数值
$first=1;
$prev=$page-1;
$next=$page+1;
$last=$pages;
if   ($page>1)
{
echo   "<a   href='fenye.php?page=".$first."'>首页</a>     ";
echo   "<a   href='fenye.php?page=".$prev."'>上一页</a>     ";
}
if   ($page<$pages)
{
echo   "<a   href='fenye.php?page=".$next."'>下一页</a>     ";
echo   "<a   href='fenye.php?page=".$last."'>尾页</a>     ";
}
echo   "转到<input   type=text   name='ys'   size='2'   value=".$page.">页";
echo   "<input   type=submit   name='Submit'   value='Go'>";
echo   "</form>";
echo   "</div>";